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Questions tagged [hdmi]

HDMI stands for High Definition Multimedia Interface. Along with the Composite RCA, HDMI is one of the devices' two video outputs. It provides high quality digital video.

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waveshare 7" LCD H : uses & reports wrong HDMI resolution

I recently got a Waveshare 7" LCD (H) with 3B+, running Raspbian updated to buster (uname -a says Linux rpi33 4.19.42-v7+ #1219 SMP Tue May 14 21:20:58 BST 2019 armv7l GNU/Linux) I set config.txt ...
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Sending from headless Raspi to HDMI screen [duplicate]

I'm working on a small project and I need my raspberry pi (model 2B, rev a01041) to send a very simple image to a little screen (probably 10x5cm). Unfortunately, I've always thought I'd never have ...
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Should HDMI 'overscan_*' adjustments act independent of each other?

Should HDMI config.txt overscan_* adjustments act independent of each other? If not, what's happening? ... what would be the process to make predictable adjustments? For example, if overscan_left &...
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how to connect my raspberry pi to pc which has no hdmi port but a 5 usb port

I am not to find out how to connect rasberry pi to my pc which has no HDMI port Any suggestions please . Thanks
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1answer
17 views

Pi3 freezes on boot when display_rotate=1

I've been struggling with an issue with my Pi. I have a 2560 x 1440p HDMI screen that i've been trying to get to work. After getting the HDMI timings and settings from the manufacturer it shows the ...
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36 views

How do I capture and stream HDMI audio out to LAN

I have a RPi that is running videos with omxplayer and outputting to my tv. HDMI video and audio out work just fine, but I would additionally like to stream only the audio to my network (via RTP or ...
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27 views

No login prompt on HDMI console

I have a minimalistic buildroot build on RPi2 and I was using the serial on PuTTY (UART pins connected via USB) to log in as root. However, I don't see an login prompt on my monitor when I connect ...
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Is it possible to adjust the backlight of a DELL U2414H monitor connected via HDMI?

I have a magic mirror I'm building that has a RPI at it's heart but even with the screen blanked at night, I can see the backlight glowing. Is there any way to adjust backlight brightness via the ...
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19 views

How to extend desktopacross to HDMI panels HDMI only

So with two waveshare 7" touch panels HDMI panels, an HDMI splitter and a raspberry pi zero w, I can mirror the display. I am not sure how to extend the screen across two HDMI panels. Does anyone ...
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15 views

How do I stop my HDMI going off

for some reason, after a while the screen connected to my RPI 3B+ goes off, and stays off, until I unplug it and plug it back in again. I only run in console mode, and running alt+F[1-4] does nothing,...
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34 views

HDMI port is not working

I have been using an RPI3B+ for around 2 months . I used it remotely most of the time. Recently, when I was trying connect it with a monitor via HDMI to VGA converter , it didn't work at all. I ...
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24 views

Ethernet speed: Screen ON vs screen OFF

I've a Raspberry Pi 3 B+ with Ubuntu 18.04 installed. With an SSH connection with my Kubuntu PC, the transfer is good (4.5Mo/s) when RPi's screen is OFF (via xset dpms force standby) but if the RPi's ...
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26 views

Weird output on 10.1" HDMI/USB touchscreen (Waveshare)

I have an HDMI+USB 10.1" screen connected to Pi. When used only HDMI is work fine but when pluged usb (touch) the display weird output.
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21 views

My raspberry pi 3+ suddenly stopped displaying

I've been using this raspberry pi for months to run LibreELEC to run Kodi. One day it didn't let out a HDMI signal. I no longer am able to a HDMI signal at all, my SD card is fine, I even reinstalled ...
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28 views

HDMI Screen interference and intermittant blinking

OK, Befote I describe this issue. Here's the setup.. RPi3B+ with external USB HD boot, The PSU is a TracoPower (professional) 5A PSU. The RPi power LED is not blinking nor lightening symbol on screen. ...
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21 views

Unable to get HDMI connection via Raspberry Pi 3 B+

I have a Raspberry Pi 3 B+ model and a FLATRON W20437 LG monitor along with a 5V 2.8A Power Supply and a keyboard. After I load the contents of Raspbian OS with stretch on the SD Card (32 GB Samsung ...
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1answer
318 views

How to Connect Raspberry Pi 3 to Laptop via Ethernet Cable

How do I display Raspberry Pi 3 screen onto laptop? I followed instructions to set up Raspberry Pi here, https://projects.raspberrypi.org/en/projects/raspberry-pi-setting-up I got up to here, https:...
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3answers
92 views

Video output filter

I would like to be imbed a filter in the Pi’s HDMI output such that pixels are slightly rearranged. Specifically, I’m after a retro pincushion effect ([ ] -> ( )). I need it to be active even in the ...
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1answer
40 views

How can I switch the TV to the Pi's HDMI input on a key press/mouse click?

I've got a TV with an Apple TV, Pi, and a PS4 plugged into it. Both the Apple TV and the PS4 switch to their HDMI inputs when I click the remote or turn the controller on. How can I achieve the same ...
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1answer
144 views

A working HDMI switch for Raspberry PI 3?

I have a Pi 3 and regular desktop computer with a single (DVI input) monitor. The desktop and Pi both have HDMI out for video. I use an HDMI > DVI cable to connect whichever device I want to use to ...
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1answer
113 views

Software adjustment of gamma/brightness settings in Raspbian

I am trying to find a way to control the apparent brightness of my external screen on Raspbian Stretch. In my situation, there is no need to actually control the backlight, as I only want to change ...
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27 views

EDID problem with different monitors

I've got 2 monitors I use with a pi. The HP monitor self identifies root@raspberrypi:/home/pi# tvservice -n device_name=HWP-HP_L1755 & it is happy with the preferred hdmi settings root@...
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1answer
41 views

Control GPIO from HDMI V sync

My Project on a Raspberry Pi 2 with Raspian stretch. I want use a GPIO pin to drive 3d shutter glasses (glasses hacked to receive 0 _3V square wave) Video playing on the HDMI port and A Pin goes on ...
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2answers
82 views

Raspbian Stretch lite doesnt send HDMI signal on second boot

I have installed the most recent Raspbian Stretch lite (release: 2018-11-13) to a SanDisk ultra A1 micro SD card to use it for my Raspberry Pi model 3B. I connected a HDMI monitor and a USB keyboard ...
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116 views

How to configure duplicate screen on a Pi?

I have a Raspberry Pi 2 connected with a TouchScreen. I also connect another external display via HDMI. Goal I've been trying to make my external display show as duplicate mirror the one on the ...
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0answers
75 views

SONY TV as Display / Monitor

Background: I have successfully used pi-3b+ to display on LG LED TV, New model Sony 4K LED TV. Requesting your support: The year 2011 SONY 40NX710 model is showing blank (No desktop / text-console). ...
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1answer
82 views

Can I connect two Raspberry Pis to one 5" Display via an HDMI switch?

I have two Raspberry Pis running very different systems. I want to build an enclosure so that I can use a single 5" display (Amazon link) for both Pis. The setup I'm envisioning would rely on an ...
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0answers
91 views

Raspbian Stretch doesn't show any display on boot

I installed the image of raspbian stretch (version: 9) on an SD card and mounted the card on the Raspberry Pi. On first boot the display came up and the initial setup was done. In addition to the ...
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20 views

Any difference between using HDMI versus composite for fbcp?

Is there any tangible difference at all between using composite video and HDMI to copy to a TFT with fbcp? It would be done with hdmi_force_hotplug=1 and hdmi_ignore_hotplug=1.
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74 views

Raspberry Pi Touch Screen - I can't do anything

So, I recently bought a UCTRONICS LCD 3.5 in. touch screen for the Raspberry Pi (I have a Raspberry Pi 3 with Raspbian Stretch), and attaching it and getting it to turn on worked just fine. I ...
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No video on SV-3 instrument viewer

When I set the Pi (Zero) up with the required 640x480 60Hz mode in config.txt the SV-3 reports no signal. But if I plug a VGA Acer monitor in to the Pi and then unplug it, plugging in the SV-3 works! ...
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24 views

No HDMI Output on Raspberry Pi 2B

I am a complete beginner, an have been having some issues with a Pi 2B. I was helping my school librarian set up a message display. I got a Pi, downloaded the OS, and used Etcher to put it on a USB ...
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1answer
124 views

Pi 2 won't boot without touchscreen connected

Timeline of events: Installed a stable version of Raspbian, all systems work no real testing with the GPIO but HDMI and SSH work. Tested various GPIO pins for running fans and several pieces of ...
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36 views

Resolution problem in 5 inch screen

I have one 5" screen, when I connect it to my Raspberry Pi see like this: But when I connect it to my computer the screen works well: I tried with change the parameter in video section in config....
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14 views

Multiple delayed output from pi camera

I’m trying to create up to 4 delayed outputs from the pi camera. The length of the delay needs to be varied 15-60 seconds. Is there a way to buffer the cameras feed and use the same buffer for all the ...
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1answer
158 views

Raspberry PI not accessible without HDMI plugged in

I have a Raspberry Pi 3. For whatever reason, it doesn't seem to boot up if the HDMI cable is not plugged in. I am running the latest "stretch" desktop version. Steps taken: 1) Plug in AC adapter. ...
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2answers
99 views

Weird resolution

So, im new to the raspberry pi. When i first started it and installed the raspian os with noobs, it had fine resolution. But then i rebooted, and for some reason the noobs menu was in alright ...
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1answer
89 views

Pi Zero HDMI Problem

I have problem with connecting pi zero to tft screen over hdmi. I tested hdmi cable, config file(same sd card) and tft screen with Pi 3B, I tested micro hdmi adapter(which connected to pi zero) with ...
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1answer
362 views

Elecrow 7" HDMI screen reports No Signal

I'm attempting to get an Elecrow 7" HDMI LCD touchscreen (Amazon UK) to work with my Raspberry Pi 3 B+. Upon following the instructions enclosed with the screen, all I see is "No Signal". The ...
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1answer
134 views

Couldn't get a display on the screen when using the RPi

I had a long time I didn't get my hand on the RPi. I got the Emlid image burned on a 8gb micro sdcard using the dd command. I have the pi connected to a the screen using HDMI to VGI cable, but I get ...
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1answer
36 views

Why does screen go blank while wifi data is being transmitted?

I got a Raspberry Pi 3 B+ with 2.5A power supply that came with it. I've connected a VGA monitor (via an HDMI-VGA adapter) and keyboard to it, and connected it to the WiFi. From the beginning, the ...
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1answer
57 views

Is there a way to detect if the AUX port of the Raspberry Pi 3 Model B+ is in use?

We are trying to detect if the AUX (3.5mm) port of the Raspberry Pi is in use so we can automatically swap the output sound to either that or HDMI. If there is no straight answer, are there any ...
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1answer
591 views

HDMI-CEC: switch the device to the port where Raspberry is connected

I am using my Raspberry only for a Spotify connect client (Raspotify), the device connects to an AV Receiver which has a number of HDMI ports. After 2 days of trial and error I managed to figure out ...
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829 views

Raspberry Pi 3 Model B+ goes to black screen after a short while of inactivity

It ranges between 10 to 30 minutes. It is attached to a TV via HDMI. The monitor will go black. Moving the mouse of tapping the keyboard of the Raspberry Pi will "wake up" the screen pretty quickly. ...
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71 views

3.5in TFT screen hat and Raspberry Pi 3+b

I'm trying to understand something about the MPI3508 screen I purchased (https://www.amazon.ca/dp/B07DQKQG6X). I tried powering it via usb and connected a PC in its HDMI input and got it working (the ...
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1answer
246 views

How to start xorg on a physically connected display via SSH?

The pi is configured to start into text mode so that no xorg libraries are loaded during normal operation. Yet I would like to be able to occasionally run a xorg desktop session when connected to an ...
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2answers
1k views

HDMI audio on Raspberry pi 3 b not working

I've already seen Audio over HDMI not working on Pi 3 (audio not working though HDMI, but working though speakers) but the actions described by @Vader did not work for me. The fact is that it ...
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1answer
206 views

Display controller for HDMI shows no signal only for Raspberry

I'm bought a (notebook) display LP171WP4 (TL)(01) and a display controller. Both are working if I connect it to my Macbook via HDMI. But with the Raspberry PI 3 B it doesn't work. The display is on ...
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0answers
132 views

How to troubleshoot a permanently blinking green light on a Pi3b?

The green light on a Pi3b is blinking permanently, even after bootup. It outputs two flashes at a time for as long as the power is on. Is this normal? If not, how do I troubleshoot this? Background ...
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152 views

raspberry pi model b+ Not booting

I recently bought a raspberry pi 3 b+ from amazon and when I got it delivered the package was already opened, so I just want to check if my raspberry is working or not so I formatted a compatible sd ...